/**
 * 统一导航栏样式
 * 设计风格：深蓝渐变背景，现代化圆角设计，平滑过渡效果
 */

/* 确保页面内容不被固定导航栏遮挡 */
body.has-navbar {
    padding-top: 56px !important;
    margin: 0 !important;
}

body.has-navbar > :first-child:not(.navbar) {
    margin-top: 0 !important;
}

/* 强制重置 nav 标签样式，防止与其他CSS冲突 */
nav.navbar {
    all: unset;
    display: block;
}

/* 移动端菜单按钮 - 桌面端强制隐藏 */
.mobile-menu-toggle {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    position: absolute !important;
    top: -9999px !important;
    left: -9999px !important;
}

/* 导航栏主体 */
.navbar {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%) !important;
    box-shadow: 0 4px 12px rgba(30, 27, 75, 0.3) !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    z-index: 9999 !important;
    padding: 0 !important;
    display: flex !important;
    align-items: center !important;
    height: 56px !important;
    margin: 0 !important;
    border: none !important;
    border-radius: 0 !important;
}

/* 导航栏容器 */
.navbar-container {
    max-width: 1200px !important;
    margin: 0 auto !important;
    padding: 0 16px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    height: 100% !important;
    width: 100% !important;
}

/* 品牌logo区域 */
.navbar-brand {
    display: flex !important;
    align-items: center !important;
    margin-right: 24px !important;
    padding: 0 !important;
}

.navbar-brand a {
    display: flex !important;
    align-items: center !important;
    text-decoration: none !important;
    color: #ffffff !important;
    transition: transform 0.2s ease !important;
    padding: 0 !important;
}

.navbar-brand a:hover {
    transform: translateY(-1px) !important;
}

.brand-icon {
    font-size: 1.4rem !important;
    margin-right: 8px !important;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2)) !important;
}

.brand-text {
    font-size: 1rem !important;
    font-weight: 600 !important;
    letter-spacing: 0.5px !important;
    background: linear-gradient(135deg, #fff 0%, #c7d2fe 100%) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
}

/* 导航菜单 */
.navbar-menu {
    display: flex !important;
    align-items: center !important;
    flex-grow: 1 !important;
    gap: 4px !important;
    padding: 0 !important;
    margin: 0 !important;
}

.navbar-menu .nav-link {
    display: flex !important;
    align-items: center !important;
    padding: 6px 14px !important;
    color: rgba(255, 255, 255, 0.82) !important;
    text-decoration: none !important;
    font-size: 0.85rem !important;
    font-weight: 500 !important;
    border-radius: 6px !important;
    transition: all 0.2s ease !important;
    position: relative !important;
    white-space: nowrap !important;
    background: none !important;
    border: none !important;
    margin: 0 !important;
}

.navbar-menu .nav-link:hover {
    color: #ffffff !important;
    background-color: rgba(255, 255, 255, 0.1) !important;
    transform: translateY(-1px) !important;
}

.navbar-menu .nav-link.active {
    color: #ffffff !important;
    background-color: rgba(99, 102, 241, 0.4) !important;
}

.navbar-menu .nav-link.active::after {
    content: '' !important;
    position: absolute !important;
    bottom: -6px !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    width: 18px !important;
    height: 2px !important;
    background: linear-gradient(90deg, #818cf8, #c4b5fd) !important;
    border-radius: 1px !important;
}

/* 试题篮徽章 */
.cart-link {
    position: relative !important;
}

.cart-badge {
    position: absolute !important;
    top: -4px !important;
    right: -8px !important;
    min-width: 18px !important;
    height: 18px !important;
    padding: 0 5px !important;
    background: linear-gradient(135deg, #f59e0b, #ef4444) !important;
    border-radius: 9px !important;
    font-size: 0.65rem !important;
    font-weight: 600 !important;
    color: white !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2) !important;
    animation: badgePulse 2s ease-in-out infinite !important;
}

@keyframes badgePulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        height: auto !important;
        padding: 8px 0 !important;
    }
    
    .navbar-container {
        padding: 0 12px !important;
        flex-wrap: wrap !important;
        align-items: flex-start !important;
    }
    
    .navbar-menu {
        order: 2 !important;
        width: 100% !important;
        justify-content: flex-start !important;
        gap: 4px !important;
        margin-top: 8px !important;
        padding-top: 8px !important;
        border-top: 1px solid rgba(255, 255, 255, 0.1) !important;
    }
    
    .navbar-menu .nav-link {
        padding: 5px 12px !important;
        font-size: 0.8rem !important;
    }
    
    .brand-text {
        font-size: 0.95rem !important;
    }
    
    .navbar-brand {
        margin-right: 0 !important;
    }
    
    .brand-icon {
        font-size: 1.25rem !important;
    }

    .mobile-menu-toggle {
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
        position: static !important;
    }
}

@media (max-width: 480px) {
    .navbar-menu .nav-link {
        padding: 4px 10px !important;
        font-size: 0.75rem !important;
    }
    
    .brand-icon {
        font-size: 1.1rem !important;
    }
    
    .brand-text {
        font-size: 0.85rem !important;
    }
    
    .navbar-container {
        padding: 0 8px !important;
    }
}